fix: detect 404 in getActiveVersion by --json (#70)

Author: sapphi-red

src/utils.ts

@@ -159,11 +159,20 @@ export async function getActiveVersion(
   npmName: string,
 ): Promise<string | undefined> {
   try {
-    return (await run("npm", ["info", npmName, "version"], { stdio: "pipe" }))
-      .stdout;
+    const { stdout } = await run(
+      "npm",
+      ["info", npmName, "version", "--json"],
+      { stdio: "pipe" },
+    );
+    return JSON.parse(stdout);
   } catch (e: any) {
     // Not published yet
-    if (e.stderr.startsWith("npm ERR! code E404")) return;
+    if (e.stdout) {
+      const stdout = JSON.parse(e.stdout);
+      if (stdout.error.code === "E404") {
+        return;
+      }
+    }
     throw e;
   }
 }